EP3233843B1 - Isoxazole hydroxamic acid compounds as lpxc inhibitors - Google Patents
Isoxazole hydroxamic acid compounds as lpxc inhibitors Download PDFInfo
- Publication number
- EP3233843B1 EP3233843B1 EP15816893.0A EP15816893A EP3233843B1 EP 3233843 B1 EP3233843 B1 EP 3233843B1 EP 15816893 A EP15816893 A EP 15816893A EP 3233843 B1 EP3233843 B1 EP 3233843B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- methyl
- isoxazol
- hydroxy
- methylsulfonyl
- butanamide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
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- 239000003112 inhibitor Substances 0.000 title description 22
- JIUZZEOWWWKQSA-UHFFFAOYSA-N n-hydroxy-1,2-oxazole-3-carboxamide Chemical class ONC(=O)C=1C=CON=1 JIUZZEOWWWKQSA-UHFFFAOYSA-N 0.000 title 1
- 150000001875 compounds Chemical class 0.000 claims description 278
- -1 hydroxy, amino Chemical group 0.000 claims description 58
- 150000003839 salts Chemical class 0.000 claims description 50
- 239000003814 drug Substances 0.000 claims description 37
- 239000002955 immunomodulating agent Substances 0.000 claims description 35
- 229940121354 immunomodulator Drugs 0.000 claims description 34
- 238000011282 treatment Methods 0.000 claims description 30
- 239000008194 pharmaceutical composition Substances 0.000 claims description 28
- 229910052736 halogen Inorganic materials 0.000 claims description 27
- 150000002367 halogens Chemical class 0.000 claims description 27
- 230000002584 immunomodulator Effects 0.000 claims description 26
- 239000003937 drug carrier Substances 0.000 claims description 20
- 125000006273 (C1-C3) alkyl group Chemical group 0.000 claims description 18
- 208000035143 Bacterial infection Diseases 0.000 claims description 18
- 208000022362 bacterial infectious disease Diseases 0.000 claims description 18
- 125000005843 halogen group Chemical group 0.000 claims description 17
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims description 15
- 208000027096 gram-negative bacterial infections Diseases 0.000 claims description 15
- 125000005913 (C3-C6) cycloalkyl group Chemical group 0.000 claims description 14
- 125000006274 (C1-C3)alkoxy group Chemical group 0.000 claims description 13
- 125000000229 (C1-C4)alkoxy group Chemical group 0.000 claims description 12
- 241000588724 Escherichia coli Species 0.000 claims description 12
- 229940124597 therapeutic agent Drugs 0.000 claims description 12
- 125000004767 (C1-C4) haloalkoxy group Chemical group 0.000 claims description 11
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 11
- 241000589291 Acinetobacter Species 0.000 claims description 10
- 241000588914 Enterobacter Species 0.000 claims description 10
- MYSWGUAQZAJSOK-UHFFFAOYSA-N ciprofloxacin Chemical compound C12=CC(N3CCNCC3)=C(F)C=C2C(=O)C(C(=O)O)=CN1C1CC1 MYSWGUAQZAJSOK-UHFFFAOYSA-N 0.000 claims description 10
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 10
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- 241000588769 Proteus <enterobacteria> Species 0.000 claims description 9
- 241000589516 Pseudomonas Species 0.000 claims description 9
- 241000607142 Salmonella Species 0.000 claims description 9
- 241000607768 Shigella Species 0.000 claims description 9
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- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- JGSARLDLIJGVTE-MBNYWOFBSA-N Penicillin G Chemical compound N([C@H]1[C@H]2SC([C@@H](N2C1=O)C(O)=O)(C)C)C(=O)CC1=CC=CC=C1 JGSARLDLIJGVTE-MBNYWOFBSA-N 0.000 claims description 7
- 241000122971 Stenotrophomonas Species 0.000 claims description 7
- 108010059993 Vancomycin Proteins 0.000 claims description 7
- 125000004429 atom Chemical group 0.000 claims description 7
- 125000005842 heteroatom Chemical group 0.000 claims description 7
- JQXXHWHPUNPDRT-WLSIYKJHSA-N rifampicin Chemical compound O([C@](C1=O)(C)O/C=C/[C@@H]([C@H]([C@@H](OC(C)=O)[C@H](C)[C@H](O)[C@H](C)[C@@H](O)[C@@H](C)\C=C\C=C(C)/C(=O)NC=2C(O)=C3C([O-])=C4C)C)OC)C4=C1C3=C(O)C=2\C=N\N1CC[NH+](C)CC1 JQXXHWHPUNPDRT-WLSIYKJHSA-N 0.000 claims description 7
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- 125000004169 (C1-C6) alkyl group Chemical group 0.000 claims description 6
- 241000607473 Edwardsiella <enterobacteria> Species 0.000 claims description 6
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- ULGZDMOVFRHVEP-RWJQBGPGSA-N Erythromycin Chemical compound O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]([C@H](O)[C@@H](C)C(=O)[C@H](C)C[C@@](C)(O)[C@H](O[C@H]2[C@@H]([C@H](C[C@@H](C)O2)N(C)C)O)[C@H]1C)(C)O)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 ULGZDMOVFRHVEP-RWJQBGPGSA-N 0.000 claims description 6
- 241000588771 Morganella <proteobacterium> Species 0.000 claims description 6
- 241001248479 Pseudomonadales Species 0.000 claims description 6
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- 229960003405 ciprofloxacin Drugs 0.000 claims description 5
- 229960001225 rifampicin Drugs 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- WQHXBELWDMILAB-OAHLLOKOSA-N (2R)-4-[5-(2-cyclobutylethynyl)-1,2-oxazol-3-yl]-N-hydroxy-2-methyl-2-methylsulfonylbutanamide Chemical compound C1(CCC1)C#CC1=CC(=NO1)CC[C@](C(=O)NO)(S(=O)(=O)C)C WQHXBELWDMILAB-OAHLLOKOSA-N 0.000 claims description 4
- FNBDPIMFTNDRPL-CQSZACIVSA-N (2R)-4-[5-(5-fluoropent-1-ynyl)-1,2-oxazol-3-yl]-N-hydroxy-2-methyl-2-methylsulfonylbutanamide Chemical compound FCCCC#CC1=CC(=NO1)CC[C@](C(=O)NO)(S(=O)(=O)C)C FNBDPIMFTNDRPL-CQSZACIVSA-N 0.000 claims description 4
- NNKXHFHRXKVUFY-DPQIITEBSA-N (2R)-4-[5-[(E)-2-cyclopropyl-1-fluoroethenyl]-1,2-oxazol-3-yl]-N-hydroxy-2-methyl-2-methylsulfonylbutanamide Chemical compound C1(CC1)/C=C(/F)\C1=CC(=NO1)CC[C@](C(=O)NO)(S(=O)(=O)C)C NNKXHFHRXKVUFY-DPQIITEBSA-N 0.000 claims description 4
- DJQUQGMPHDPDOR-VBROQKIQSA-N (2R)-4-[5-[(E)-2-cyclopropylethenyl]-1,2-oxazol-3-yl]-N-hydroxy-2-methyl-2-methylsulfonylbutanamide Chemical compound C1(CC1)/C=C/C1=CC(=NO1)CC[C@](C(=O)NO)(S(=O)(=O)C)C DJQUQGMPHDPDOR-VBROQKIQSA-N 0.000 claims description 4
- QYAMMAAJIFLOJK-URWSZGRFSA-N (2R)-4-[5-[(E)-but-1-enyl]-1,2-oxazol-3-yl]-N-hydroxy-2-methyl-2-methylsulfonylbutanamide Chemical compound C(=C\CC)/C1=CC(=NO1)CC[C@](C(=O)NO)(S(=O)(=O)C)C QYAMMAAJIFLOJK-URWSZGRFSA-N 0.000 claims description 4
- NNKXHFHRXKVUFY-SMJHDNPOSA-N (2R)-4-[5-[(Z)-2-cyclopropyl-1-fluoroethenyl]-1,2-oxazol-3-yl]-N-hydroxy-2-methyl-2-methylsulfonylbutanamide Chemical compound C1(CC1)\C=C(/F)\C1=CC(=NO1)CC[C@](C(=O)NO)(S(=O)(=O)C)C NNKXHFHRXKVUFY-SMJHDNPOSA-N 0.000 claims description 4
- UIAPGTQPRUUZDC-ICDLMJIXSA-N (2R)-4-[5-[(Z)-2-cyclopropyl-2-fluoroethenyl]-1,2-oxazol-3-yl]-N-hydroxy-2-methyl-2-methylsulfonylbutanamide Chemical compound C1(CC1)/C(=C/C1=CC(=NO1)CC[C@](C(=O)NO)(S(=O)(=O)C)C)/F UIAPGTQPRUUZDC-ICDLMJIXSA-N 0.000 claims description 4
- JRLMQJDKZZNZPI-CQSZACIVSA-N (2R)-4-[5-[2-(3,3-difluorocyclobutyl)ethynyl]-1,2-oxazol-3-yl]-N-hydroxy-2-methyl-2-methylsulfonylbutanamide Chemical compound FC1(CC(C1)C#CC1=CC(=NO1)CC[C@](C(=O)NO)(S(=O)(=O)C)C)F JRLMQJDKZZNZPI-CQSZACIVSA-N 0.000 claims description 4
- AXLQZFHCOJMXSL-QKFMDRJYSA-N (2R)-4-[5-[2-(3-fluorocyclobutyl)ethynyl]-1,2-oxazol-3-yl]-N-hydroxy-2-methyl-2-methylsulfonylbutanamide Chemical compound FC1CC(C1)C#CC1=CC(=NO1)CC[C@](C(=O)NO)(S(=O)(=O)C)C AXLQZFHCOJMXSL-QKFMDRJYSA-N 0.000 claims description 4
- HXASNMZKXXTCIA-OAHLLOKOSA-N (2R)-N-hydroxy-2-methyl-4-[5-[2-(1-methylcyclopropyl)ethynyl]-1,2-oxazol-3-yl]-2-methylsulfonylbutanamide Chemical compound ONC([C@@](CCC1=NOC(=C1)C#CC1(CC1)C)(S(=O)(=O)C)C)=O HXASNMZKXXTCIA-OAHLLOKOSA-N 0.000 claims description 4
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- IDYHXBDGQJBMBW-PWGQDJSOSA-N (2R)-N-hydroxy-4-[5-[2-[3-(2-hydroxypropan-2-yl)cyclobutyl]ethynyl]-1,2-oxazol-3-yl]-2-methyl-2-methylsulfonylbutanamide Chemical compound CC(C)(O)C1CC(C1)C#CC1=CC(CC[C@](C)(C(=O)NO)S(C)(=O)=O)=NO1 IDYHXBDGQJBMBW-PWGQDJSOSA-N 0.000 claims description 4
- WBXGIGGTABKRTD-QWQCLYJRSA-N (2R)-N-hydroxy-4-[5-[2-[3-(methoxymethyl)cyclobutyl]ethynyl]-1,2-oxazol-3-yl]-2-methyl-2-methylsulfonylbutanamide Chemical compound ONC([C@@](CCC1=NOC(=C1)C#CC1CC(C1)COC)(S(=O)(=O)C)C)=O WBXGIGGTABKRTD-QWQCLYJRSA-N 0.000 claims description 4
- XSGRUGUHLIDURN-UYAOXDASSA-N (2R)-N-hydroxy-4-[5-[2-[4-[(1S)-2-hydroxy-1-methoxyethyl]phenyl]ethynyl]-1,2-oxazol-3-yl]-2-methyl-2-methylsulfonylbutanamide Chemical compound ONC([C@@](CCC1=NOC(=C1)C#CC1=CC=C(C=C1)[C@@H](CO)OC)(S(=O)(=O)C)C)=O XSGRUGUHLIDURN-UYAOXDASSA-N 0.000 claims description 4
- IFVQKALSMCSFEP-RDJZCZTQSA-N (2S,3R)-2-[[5-(2-cyclopropylethynyl)-1,2-oxazol-3-yl]methylamino]-N,3-dihydroxy-2-methyl-3-(5-methyl-1,2-oxazol-3-yl)propanamide Chemical compound C1(CC1)C#CC1=CC(=NO1)CN[C@](C(=O)NO)([C@H](C1=NOC(=C1)C)O)C IFVQKALSMCSFEP-RDJZCZTQSA-N 0.000 claims description 4
- 125000006163 5-membered heteroaryl group Chemical group 0.000 claims description 4
- WZPBZJONDBGPKJ-UHFFFAOYSA-N Antibiotic SQ 26917 Natural products O=C1N(S(O)(=O)=O)C(C)C1NC(=O)C(=NOC(C)(C)C(O)=O)C1=CSC(N)=N1 WZPBZJONDBGPKJ-UHFFFAOYSA-N 0.000 claims description 4
- CEAZRRDELHUEMR-URQXQFDESA-N Gentamicin Chemical compound O1[C@H](C(C)NC)CC[C@@H](N)[C@H]1O[C@H]1[C@H](O)[C@@H](O[C@@H]2[C@@H]([C@@H](NC)[C@@](C)(O)CO2)O)[C@H](N)C[C@@H]1N CEAZRRDELHUEMR-URQXQFDESA-N 0.000 claims description 4
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- SGHKRYQYESMPJJ-UHFFFAOYSA-N N-hydroxy-4-[5-[2-[4-(hydroxymethyl)phenyl]ethynyl]-1,2-oxazol-3-yl]-2-methyl-2-methylsulfonylbutanamide Chemical compound ONC(C(CCC1=NOC(=C1)C#CC1=CC=C(C=C1)CO)(S(=O)(=O)C)C)=O SGHKRYQYESMPJJ-UHFFFAOYSA-N 0.000 claims description 4
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- MQTOSJVFKKJCRP-BICOPXKESA-N azithromycin Chemical compound O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]([C@H](O)[C@@H](C)N(C)C[C@H](C)C[C@@](C)(O)[C@H](O[C@H]2[C@@H]([C@H](C[C@@H](C)O2)N(C)C)O)[C@H]1C)(C)O)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 MQTOSJVFKKJCRP-BICOPXKESA-N 0.000 claims description 4
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- 125000001981 tert-butyldimethylsilyl group Chemical group [H]C([H])([H])[Si]([H])(C([H])([H])[H])[*]C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
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- WHRNULOCNSKMGB-UHFFFAOYSA-N tetrahydrofuran thf Chemical compound C1CCOC1.C1CCOC1 WHRNULOCNSKMGB-UHFFFAOYSA-N 0.000 description 1
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- WROMPOXWARCANT-UHFFFAOYSA-N tfa trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F.OC(=O)C(F)(F)F WROMPOXWARCANT-UHFFFAOYSA-N 0.000 description 1
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- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
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- GFNANZIMVAIWHM-OBYCQNJPSA-N triamcinolone Chemical compound O=C1C=C[C@]2(C)[C@@]3(F)[C@@H](O)C[C@](C)([C@@]([C@H](O)C4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 GFNANZIMVAIWHM-OBYCQNJPSA-N 0.000 description 1
- IHZAEIHJPNTART-UHFFFAOYSA-N tribromofluoromethane Chemical compound FC(Br)(Br)Br IHZAEIHJPNTART-UHFFFAOYSA-N 0.000 description 1
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- IEDVJHCEMCRBQM-UHFFFAOYSA-N trimethoprim Chemical compound COC1=C(OC)C(OC)=CC(CC=2C(=NC(N)=NC=2)N)=C1 IEDVJHCEMCRBQM-UHFFFAOYSA-N 0.000 description 1
- LBNVCJHJRYJVPK-UHFFFAOYSA-N trimethyl(4-trimethylsilylbuta-1,3-diynyl)silane Chemical compound C[Si](C)(C)C#CC#C[Si](C)(C)C LBNVCJHJRYJVPK-UHFFFAOYSA-N 0.000 description 1
- BOQZOWGUQPXXFC-UHFFFAOYSA-N trimethyl(penta-1,3-diynyl)silane Chemical compound CC#CC#C[Si](C)(C)C BOQZOWGUQPXXFC-UHFFFAOYSA-N 0.000 description 1
- PBSHVEOONSKWJF-UHFFFAOYSA-M triphenyl(3-trimethylsilylprop-2-ynyl)phosphanium;bromide Chemical compound [Br-].C=1C=CC=CC=1[P+](C=1C=CC=CC=1)(CC#C[Si](C)(C)C)C1=CC=CC=C1 PBSHVEOONSKWJF-UHFFFAOYSA-M 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
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- WVPSKSLAZQPAKQ-CDMJZVDBSA-N trovafloxacin Chemical compound C([C@H]1[C@@H]([C@H]1C1)N)N1C(C(=CC=1C(=O)C(C(O)=O)=C2)F)=NC=1N2C1=CC=C(F)C=C1F WVPSKSLAZQPAKQ-CDMJZVDBSA-N 0.000 description 1
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- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
- A61K31/42—Oxazoles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
- A61K31/42—Oxazoles
- A61K31/422—Oxazoles not condensed and containing further heterocyclic rings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P11/00—Drugs for disorders of the respiratory system
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/04—Antibacterial agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D261/00—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings
- C07D261/02—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings
- C07D261/06—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings having two or more double bonds between ring members or between ring members and non-ring members
- C07D261/08—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings having two or more double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
- C07D413/06—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
- C07D413/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2300/00—Mixtures or combinations of active ingredients, wherein at least one active ingredient is fully defined in groups A61K31/00 - A61K41/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Definitions
- This invention pertains generally to compounds and compositions and their use as a medicament.
- the invention pertains to treating bacterial infections, particularly Gram-negative infections using compounds disclosed herein.
- the compounds are believed to act by inhibiting the activity of UDP-3-O-(R-3-hydroxydecanoyl)-N-acetylglucosamine deacetylase (LpxC).
- the invention includes compounds of Formula (I) which inhibit LpxC and pharmaceutical formulations containing such inhibitors.
- the inhibitors can be used to treat bacterial infections, especially Gram-negative infections in subjects, including humans. These compounds may be used alone or in combination with other antibacterials.
- nosocomial infections Over the past several decades, the frequency of antimicrobial resistance and its association with serious infectious diseases have increased at alarming rates.
- nosocomial infections Of the over 2 million nosocomial infections occuring each year in the United States, 50 to 60% are caused by antimicrobial-resistant strains of bacteria.
- the high rate of resistance to commonly-used antibacterial agents increases the morbidity, mortality, and costs associated with nosocomial infections.
- nosocomial infections In the United States, nosocomial infections are thought to contribute to or cause more than 77,000 deaths per year and cost approximately $5 to $10 billion annually.
- Gram-negative bacteria Only a few classes of approved antibacterials are effective on Gram-negative bacteria . Important causes of Gram-negative resistance include extended-spectrum ⁇ -lactamases (ESBLs) in Klebsiella pneumoniae, Escherichia coli, and Proteus mirabilis, high-level third-generation cephalosporin (Amp C) ⁇ -lactamase resistance among Enterobacter species and Citrobacter freundii, and multidrug-resistance genes observed in Pseudomonas species, Acinetobacter species, and Stenotrophomonas species.
- ESBLs extended-spectrum ⁇ -lactamases
- Amp C high-level third-generation cephalosporin
- Such antibacterial compounds acting on lipopolysaccharide biosynthesis have been reported, including various hydroxamic acid compounds: see for example WO2004/062601 , WO2010/032147 , WO2011/073845 , WO2012/120397 , and WO2012/137094 .
- One lipopolysaccharide biosynthesis enzyme, UDP-3-O-(R-3-hydroxydecanoyl)-N-acetylglucosamine deacetylase (LpxC) has been reported as a validated target for antibacterials( Mdluli, et al., Antimicrobial Agents and Chemotherapy, 50(6), 2178-84 (2006 ).
- the current invention provides new antibacterial hydroxamic acid compounds that are believed to act by inhibition of LpxC and that avoid at least some of the prevalent mechanisms of resistance to known antibacterial agents.
- the present invention provides novel compounds, pharmaceutical formulations including the compounds, and the use of those novel compounds in methods of inhibiting UDP-3-O-(R-3-hydroxydecanoyl)-N-acetylglucosamine deacetylase (LpxC) and treating Gram-negative bacterial infections.
- the invention provides compounds of Formula (I) or a pharmaceutically acceptable salt thereof, wherein:
- the invention provides a compound of formula I for use in a method of inhibiting a deacetylase enzyme in Gram-negative bacteria, thereby affecting bacterial growth, comprising contacting the bacteria with a compound of formula I.
- compounds of Formula I include any of the subsets or specific examples of such compounds that are disclosed herein.
- the invention provides a compound of Formula I for use in a method of inhibiting LpxC, thereby modulating the virulence of a bacterial infection, comprising administering to a patient in need of such inhibition (or in need of treatment for such bacterial infection) a compound of Formula I.
- the invention provides a compound of formula I for use in treating a subject with a Gram-negative bacterial infection, wherein the method comprises administering to the subject an antibacterially effective amount of a compound of formula I; optionally, the compound may be combined with a pharmaceutically acceptable carrier for such administration.
- the subject is a mammal and in some embodiments, the subject is a human.
- Gram-negative bacterial infections suitable for treatment with the compounds and compositions of the invention are disclosed herein.
- the invention provides a compound of formula I for use in a method of administering an inhibitory amount of a compound of formula I to fermentative or non-fermentative Gram-negative bacteria, which can be carried out in vivo, e.g. in a subject infected with the Gram-negative bacteria, or in vitro, e.g. in cell culture.
- the Gram-negative bacteria are selected from the group consisting of Pseudomonas aeruginosa and other Pseudomonas spp., Stenotrophomonas maltophilia, Burkholderia cepacia and other Burkholderia spp.,
- Alcaligenes xylosoxidans Alcaligenes xylosoxidans, Acinetobacter spp., Achromobacter spp., Aeromonas spp., Enterobacter spp., Eschericia coli, Haemophilus spp., Klebsiella spp., Moraxella spp., Bacteroides spp., Francisella spp., Shigella spp., Proteus spp., Porphyromonas spp., Prevotella spp., Mannheimia haemolyiticus, Pasteurella spp., Providencia spp., Vibrio spp., Salmonella spp., Bordetella spp., Borrelia spp., Helicobacter spp., Legionella spp., Citrobacter spp., Cedecea spp., Serratia spp., Campylobacter spp
- the invention provides a compound of formula I for use in treatment of a Gram-negative bacterial infection, wherein the bacterial infection is selected from the Pseudomonadales and Enterobacteriaceae species which is selected from the group consisting of organisms such as Pseudomonas, Acinetobacter, Stenotrophomonas, Burkholderia, Serratia, Proteus, Klebsiella, Enterobacter, Citrobacter, Salmonella, Shigella, Providencia, Morganella, Cedecea, Yersinia and Edwardsiella species and Escherichia coli.
- the bacterial infection is selected from the Pseudomonadales and Enterobacteriaceae species which is selected from the group consisting of organisms such as Pseudomonas, Acinetobacter, Stenotrophomonas, Burkholderia, Serratia, Proteus, Klebsiella, Enterobacter, Citrobacter, Salmonella, Shi
- compositions comprising a compound of Formula I admixed with a pharmaceutically acceptable carrier or excipient.
- the pharmaceutical composition may comprise at least two pharmaceutically acceptable carriers and/or excipients.
- the pharmaceutical composition is prepared for administration in the form of a unit dosage that contains a therapeutically effective amount of a compound of Formula I for treatment of a subject having a Gram-negative bacterial infection.
- the unit dosage is in a form suitable for injection, infusion, inhalation or oral delivery.
- compositions according to the present invention are provided which include any of the compounds described above and a pharmaceutically acceptable carrier.
- the pharmaceutical composition comprises two or more pharmaceutically acceptable carriers and/or excipients.
- the invention also provides for the use of the compounds of Formula I in preparing medicaments and pharmaceutical formulations, for use of the compounds in inhibiting LpxC, and for use of the compounds as medicaments, especially for treating bacterial infections in a subject.
- the present invention is also directed to a combination therapy for treating or preventing a Gram-negative bacterial infection in patients, using the compounds of the invention or pharmaceutical compositions thereof, or kits containing these compounds or pharmaceutical compositions, in combination with at least one other therapeutic agent.
- a combination therapy for treating or preventing a Gram-negative bacterial infection in patients, using the compounds of the invention or pharmaceutical compositions thereof, or kits containing these compounds or pharmaceutical compositions, in combination with at least one other therapeutic agent.
- Other aspects of the invention are discussed infra.
- LpxC is an abbreviation that stands for UDP-3-O-(R-3-hydroxydecanoyl)-N-acetylglucosamine deacetylase. While not limited by the theory, it is believed that the compounds of the invention provide their antibacterial effect primarily by inhibiting LpxC.
- the term "subject” refers to an animal.
- the animal is a mammal.
- a subject also refers to for example, primates ( e.g., humans), cows, sheep, goats, horses, dogs, cats, rabbits, rats, mice, fish, birds and the like.
- the subject is a human.
- a "patient” as used herein refers to a human subject.
- the term “inhibit”, “inhibition” or “inhibiting” refers to the reduction or suppression of a given condition, symptom, or disorder, or disease, or a significant decrease in the baseline activity of a biological activity or process.
- the term “treat”, “treating” or “treatment” of any disease or disorder refers in one embodiment, to ameliorating the disease or disorder (i.e., slowing or arresting or reducing the development of the disease or at least one of the clinical symptoms thereof).
- “treating” or “treatment” refers to alleviating or ameliorating at least one physical parameter including those which may not be discernible by the patient.
- “treating” or “treatment” refers to modulating the disease or disorder, either physically, ( e.g., stabilization of a discernible symptom), physiologically, ( e.g., stabilization of a physical parameter), or both.
- “treating” or “treatment” refers to preventing or delaying the onset or development or progression of the disease or disorder.
- antibacterial agent refers to agents synthesized or modified in the laboratory that have either bactericidal or bacteriostatic activity.
- An "active” agent in this context will inhibit the growth of P. aeruginosa and / or other Gram-negative bacteria.
- the term “inhibiting the growth” indicates that the rate of increase in the numbers of a population of a particular bacterium is reduced. Thus, the term includes situations in which the bacterial population increases but at a reduced rate, as well as situations where the growth of the population is stopped, as well as situations where the numbers of the bacteria in the population are reduced or the population is even eliminated. If an enzyme activity assay is used to screen for inhibitors, one can make modifications in bacterial uptake/efflux, solubility, half-life, etc. to compounds in order to correlate enzyme inhibition with growth inhibition.
- Optionally substituted means the group referred to can be substituted at one or more positions by any one or any combination of the radicals suitable for substitution on that group.
- the number, placement and selection of substituents is understood to encompass only those substitutions that a skilled chemist would expect to be reasonably stable; thus 'oxo' would not be a substituent on an aryl or heteroaryl ring, for example, and a single carbon atom would not have three hydroxy or amino substituents.
- Halo or "halogen”, as used herein, may be fluorine, chlorine, bromine or iodine.
- C 1 -C 6 alkyl or "C 1-6 alkyl” as used herein, denotes straight chain or branched alkyl having 1-6 carbon atoms. If a different number of carbon atoms is specified, such as C 4 or C 3 , then the definition is to be amended accordingly, such as "C 1 -C 4 alkyl” will represent methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl and tert-butyl.
- C 1 -C 6 alkoxy denotes straight chain or branched alkoxy having 1-6 carbon atoms. If a different number of carbon atoms is specified, such as C 4 or C 3 , then the definition is to be amended accordingly, such as "C 1 -C 4 alkoxy” will represent methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy and tert-butoxy.
- C 1 -C 4 haloalkyl or "C 1-4 haloalkyl” as used herein, denotes straight chain or branched alkyl having 1-4 carbon atoms wherein at least one hydrogen has been replaced with a halogen.
- the number of halogen replacements can be from one up to the number of hydrogen atoms on the unsubstituted alkyl group. If a different number of carbon atoms is specified, such as C 6 or C 3 , then the definition is to be amended accordingly.
- C 1 -C 4 haloalkyl will represent methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl and tert-butyl that have at least one hydrogen substituted with halogen, such as where the halogen is fluorine: CF 3 CF 2 -, (CF 3 ) 2 CH-, CH 3 -CF 2 -, CF 3 CF 2 -, CF 3 , CF 2 H-, CF 3 CF 2 CHCF 3 or CF 3 CF 2 CF 2 CF 2 -.
- C 3 -C 8 cycloalkyl refers to a saturated monocyclic hydrocarbon ring of 3 to 8 carbon atoms. Examples of such groups include cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl. If a different number of carbon atoms is specified, such as C 3 -C 6 , then the definition is to be amended accordingly.
- “4- to 8-Membered heterocyclyl”, “5- to 6-membered heterocyclyl”, “3- to 10-membered heterocyclyl”, “3- to 14-membered heterocyclyl”, “4- to 14-membered heterocyclyl” and “5- to 14-membered heterocyclyl”, refers, respectively, to 4- to 8-membered, 5- to 6-membered, 3- to 10-membered, 3- to 14-membered, 4- to 14-membered and 5- to 14-membered heterocyclic rings; unless otherwise specified, such rings contain 1 to 7, 1 to 5, or 1 to 3 heteroatoms selected from the group consisting of nitrogen, oxygen and sulphur as ring members, and the rings may be saturated, or partially saturated but not aromatic.
- heterocyclic group can be attached at a heteroatom or a carbon atom.
- heterocyclyl includes single ring groups, fused ring groups and bridged groups. Examples of such heterocyclyl include, but are not limited to pyrrolidine, piperidine, piperazine, pyrrolidine, pyrrolidinone, morpholine, tetrahydrofuran, tetrahydrothiophene, tetrahydrothiopyran, tetrahydropyran, 1,4-dioxane, 1,4-oxathiane, 8-aza-bicyclo[3.2.1]octane, 3,8-diazabicyclo[3.2.1]octane, 3-Oxa-8-aza-bicyclo[3.2.1]octane, 8-Oxa-3-aza-bicyclo[3.2.1]octane, 2-Oxa-5-aza-bicyclo[2.2.1]heptane, 2,5-Diaza-bic
- Heteroaryl is a completely unsaturated (aromatic) ring.
- the term “heteroaryl” refers to a 5-14 membered monocyclic- or bicyclic- or tricyclic-aromatic ring system, having 1 to 8 heteroatoms selected from N, O or S.
- the heteroaryl is a 5-10 membered ring or ring system (e.g., 5-7 membered monocyclic group or an 8-10 membered bicyclic group), often a 5-6 membered ring.
- Typical heteroaryl groups include furan, isothiazole, thiadiazole, oxadiazole, indazole, indole, quinoline, 2- or 3-thienyl, 2- or 3-furyl, 2- or 3-pyrrolyl, 2-, 4-, or 5-imidazolyl, 3-, 4-, or 5- pyrazolyl, 2-, 4-, or 5-thiazolyl, 3-, 4-, or 5-isothiazolyl, 2-, 4-, or 5-oxazolyl, 3-, 4-, or 5-isoxazolyl, 3- or 5-(1,2,4-triazolyl), 4- or 5-(1,2, 3-triazolyl), tetrazolyl, triazine, pyrimidine, 2-, 3-, or 4-pyridyl, 3- or 4-pyridazinyl, 3-, 4-, or 5-pyrazinyl, 2-pyrazinyl, and 2-, 4-, or 5-pyrimidinyl.
- hydroxy or "hydroxyl” refers to the group -OH.
- the compounds and compositions described herein can be used or administered in combination with one or more therapeutic agents that act as immunomodulators, e.g., an activator of a costimulatory molecule, or an inhibitor of an immune-inhibitory molecule, or a vaccine.
- the Programmed Death 1 (PD-1) protein is an inhibitory member of the extended CD28/CTLA4 family of T cell regulators ( Okazaki et al. (2002) Curr Opin Immunol 14: 391779-82 ; Bennett et al. (2003) J. Immunol. 170:711-8 ).
- PD-1 is expressed on activated B cells, T cells, and monocytes.
- PD-1 is an immune-inhibitory protein that negatively regulates TCR signals ( Ishida, Y.
- PD-1 and PD-L1 can act as an immune checkpoint, which can lead to, e.g., a decrease in infiltrating lymphocytes, a decrease in T-cell receptor mediated proliferation, and/or immune evasion by cancerous or infected cells ( Dong et al. (2003) J. Mol. Med. 81:281-7 ; Blank et al. (2005) Cancer Immunol. Immunother. 54:307-314 ; Konishi et al.
- Immune suppression can be reversed by inhibiting the local interaction of PD-1 with PD-L1 or PD-L2; the effect is additive when the interaction of PD-1 with PD-L2 is blocked as well ( Iwai et al. (2002) Proc. Nat'l. Acad. Sci. USA 99:12293-7 ; Brown et al. (2003) J. Immunol. 170:1257-66 ).
- Immunomodulation can be achieved by binding to either the immune-inhibitory protein (e.g., PD-1) or to binding proteins that modulate the inhibitory protein (e.g., PD-L1, PD-L2).
- the combination therapies of the invention include an immunomodulator that is an inhibitor or antagonist of an inhibitory molecule of an immune checkpoint molecule.
- the immunomodulator binds to a protein that naturally inhibits the immuno-inhibitory checkpoint molecule.
- these immunomodulators can enhance the antimicrobial response, and thus enhance efficacy relative to treatment with the antibacterial compound alone.
- a compound of any one of embodiments 1-12 or a pharmaceutical composition of embodiment 13 can be administered to a subject who is being treated with an immunomodulator; the immunomodulator and compound can be administered together or separately, but are simultaneously used to treat an infection treatable with the compounds of Formula (I) as described herein.
- Immune checkpoints refers to a group of molecules on the cell surface of CD4 and CD8 T cells. These molecules can effectively serve as “brakes” to down-modulate or inhibit an adaptive immune response. Immune checkpoint molecules include, but are not limited to, Programmed Death 1 (PD-1), Cytotoxic T-Lymphocyte Antigen 4 (CTLA-4), B7H1, B7H4, OX-40, CD137, CD40, and LAG3, which directly inhibit immune cells.
- PD-1 Programmed Death 1
- CTL-4 Cytotoxic T-Lymphocyte Antigen 4
- B7H1, B7H4, OX-40 CD137, CD40, and LAG3, which directly inhibit immune cells.
- Immunotherapeutic agents which can act as immune checkpoint inhibitors useful in the methods of the present invention, include, but are not limited to, inhibitors of PD-L1, PD-L2, CTLA4, TIM3, LAG3, VISTA, BTLA, TIGIT, LAIR1, CD160, 2B4 and/or TGFR beta.
- Inhibition of an inhibitory molecule can be performed by inhibition at the DNA, RNA or protein level.
- an inhibitory nucleic acid e.g., a dsRNA, siRNA or shRNA
- the inhibitor of an inhibitory signal is a polypeptide, e.g., a soluble ligand, or an antibody or antigen-binding fragment thereof, that binds to the inhibitory molecule.
- the immunomodulator can be administered concurrently with, prior to, or subsequent to, one or more compounds of the invention, and optionally one or more additional therapies or therapeutic agents.
- the therapeutic agents in the combination can be administered in any order. In general, each agent will be administered at a dose and/or on a time schedule determined for that agent. It will further be appreciated that the therapeutic agents utilized in this combination may be administered together in a single composition or administered separately in different compositions. In general, it is expected that each of the therapeutic agents utilized in combination be utilized at levels that do not exceed the levels at which they are utilized individually. In some embodiments, the levels utilized in combination will be lower than those utilized individually.
- the antibacterial compounds described herein are administered in combination with one or more immunomodulators that are inhibitors of PD-1, PD-L1 and/or PD-L2.
- Each such inhibitor may be an antibody, an antigen binding fragment thereof, an immunoadhesin, a fusion protein, or an oligopeptide. Examples of such immunomodulators are known in the art.
- the immunomodulator is an anti-PD-1 antibody chosen from MDX-1106, Merck 3475 or CT- 011.
- the immunomodulator is an immunoadhesin (e.g., an immunoadhesin comprising an extracellular or PD-1 binding portion of PD-LI or PD-L2 fused to a constant region (e.g., an Fc region of an immunoglobulin sequence).
- an immunoadhesin e.g., an immunoadhesin comprising an extracellular or PD-1 binding portion of PD-LI or PD-L2 fused to a constant region (e.g., an Fc region of an immunoglobulin sequence).
- the immunomodulator is a PD-1 inhibitor such as AMP-224.
- the immunomodulator is a PD-LI inhibitor such as anti-PD-LI antibody.
- the immunomodulator is an anti-PD-LI binding antagonist chosen from YW243.55.S70, MPDL3280A, MEDI-4736, MSB-0010718C, or MDX-1105.
- MDX-1105 also known as BMS-936559, is an anti-PD-LI antibody described in WO2007/005874 .
- Antibody YW243.55.S70 is an anti-PD-LI described in WO 2010/077634 .
- the immunomodulator is nivolumab (CAS Registry Number: 946414-94-4 ).
- Alternative names for nivolumab include MDX-1106, MDX-1106-04, ONO-4538, or BMS-936558.
- Nivolumab is a fully human IgG4 monoclonal antibody which specifically blocks PD-1.
- Nivolumab (clone 5C4) and other human monoclonal antibodies that specifically bind to PD-1 are disclosed in US 8,008,449 , EP2161336 and WO2006/121168 .
- the immunomodulator is an anti-PD-1 antibody Pembrolizumab.
- Pembrolizumab also referred to as Lambrolizumab, MK-3475, MK03475, SCH-900475 or KEYTRUDA®; Merck
- Pembrolizumab and other humanized anti-PD-1 antibodies are disclosed in Hamid, O. et al. (2013) New England Journal of Medicine 369 (2): 134-44 , US 8,354,509 , WO2009/114335 , and WO2013/079174 .
- the immunomodulator is Pidilizumab (CT-011; Cure Tech), a humanized IgG1k monoclonal antibody that binds to PD1.
- Pidilizumab and other humanized anti-PD-1 monoclonal antibodies are disclosed in WO2009/101611 .
- anti-PD1 antibodies useful as immunomodulators for use in the methods disclosed herein include AMP 514 (Amplimmune), and anti-PD1 antibodies disclosed in US 8,609,089 , US 2010028330 , and/or US 20120114649 .
- the anti-PD-L1 antibody is MSB0010718C.
- MSB0010718C also referred to as A09-246-2; Merck Serono
- the immunomodulator is MDPL3280A (Genentech / Roche), a human Fc optimized IgG1 monoclonal antibody that binds to PD-L1.
- MDPL3280A and other human monoclonal antibodies to PD-L1 are disclosed in U.S. Patent No.: 7,943,743 and U.S Publication No.: 20120039906 .
- Other anti-PD-L1 binding agents useful as immunomodulators for methods of the invention include YW243.55.S70 (see WO2010/077634 ), MDX-1105 (also referred to as BMS-936559), and anti-PD-L1 binding agents disclosed in WO2007/005874 .
- the immunomodulator is AMP-224 (B7-DCIg; Amplimmune; e.g., disclosed in WO2010/027827 and WO2011/066342 ), is a PD-L2 Fc fusion soluble receptor that blocks the interaction between PD1 and B7-H1.
- the immunomodulator is an anti-LAG-3 antibody such as BMS-986016.
- BMS-986016 (also referred to as BMS986016) is a monoclonal antibody that binds to LAG-3.
- BMS-986016 and other humanized anti-LAG-3 antibodies are disclosed in US 2011/0150892 , WO2010/019570 , and WO2014/008218
- the combination therapies disclosed herein include a modulator of a costimulatory molecule or an inhibitory molecule, e.g., a co-inhibitory ligand or receptor.
- the costimulatory modulator, e.g., agonist, of a costimulatory molecule is chosen from an agonist (e.g., an agonistic antibody or antigen-binding fragment thereof, or soluble fusion) of OX40, CD2, CD27, CDS, ICAM-1, LFA-1 (CD11a/CD18), ICOS (CD278), 4-1BB (CD137), GITR, CD30, CD40, BAFFR, HVEM, CD7, LIGHT, NKG2C, SLAMF7, NKp80, CD160, B7-H3 or CD83 ligand.
- an agonist e.g., an agonistic antibody or antigen-binding fragment thereof, or soluble fusion
- OX40 e.g., CD2, CD27, CDS, ICAM-1, LFA-1 (CD11a/CD18), ICOS (CD278), 4-1BB (CD137), GITR, CD30, CD40, BAFFR, HVEM, CD7
- the combination therapies disclosed herein include an immunomodulator that is a costimulatory molecule, e.g., an agonist associated with a positive signal that includes a costimulatory domain of CD28, CD27, ICOS and/or GITR.
- an immunomodulator that is a costimulatory molecule, e.g., an agonist associated with a positive signal that includes a costimulatory domain of CD28, CD27, ICOS and/or GITR.
- Exemplary GITR agonists include, e.g., GITR fusion proteins and anti-GITR antibodies (e.g., bivalent anti-GITR antibodies), such as, a GITR fusion protein described in U.S. Patent No.: 6,111,090 , European Patent No.: 090505B1 , U.S Patent No.: 8,586,023 , PCT Publication Nos.: WO 2010/003118 and 2011/090754 , or an anti-GITR antibody described, e.g., in U.S. Patent No.: 7,025,962 , European Patent No.: 1947183B1 , U.S. Patent No.: 7,812,135 , U.S.
- anti-GITR antibodies e.g., bivalent anti-GITR antibodies
- Patent No.: 8,388,967 U.S. Patent No.: 8,591,886 , European Patent No.: EP 1866339 , PCT Publication No.: WO 2011/028683 , PCT Publication No.: WO 2013/039954 , PCT Publication No.: WO2005/007190 , PCT Publication No.: WO 2007/133822 , PCT Publication No.: WO2005/055808 , PCT Publication No.: WO 99/40196 , PCT Publication No.: WO 2001/03720 , PCT Publication No.: WO99/20758 , PCT Publication No.: WO2006/083289 , PCT Publication No.: WO 2005/115451 , U.S. Patent No.: 7,618,632 , and PCT Publication No.: WO 2011/051726 .
- the immunomodulator used is a soluble ligand (e.g., a CTLA-4-Ig), or an antibody or antibody fragment that binds to PD-L1, PD-L2 or CTLA4.
- the anti-PD-1 antibody molecule can be administered in combination with an anti-CTLA-4 antibody, e.g., ipilimumab, for example.
- exemplary anti-CTLA4 antibodies include Tremelimumab (IgG2 monoclonal antibody available from Pfizer, formerly known as ticilimumab, CP-675,206); and Ipilimumab (CTLA-4 antibody, also known as MDX-010, CAS No. 477202-00-9 ).
- an anti-PD-1 antibody molecule is administered after treatment with a compound of the invention as described herein.
- an anti-PD-1 or PD-L1 antibody molecule is administered in combination with an anti-LAG-3 antibody or an antigen-binding fragment thereof.
- the anti-PD-1 or PD-L1 antibody molecule is administered in combination with an anti-TIM-3 antibody or antigen-binding fragment thereof.
- the anti-PD-1 or PD-L1 antibody molecule is administered in combination with an anti-LAG-3 antibody and an anti-TIM-3 antibody, or antigen-binding fragments thereof.
- the combination of antibodies recited herein can be administered separately, e.g., as separate antibodies, or linked, e.g., as a bispecific or trispecific antibody molecule.
- a bispecific antibody that includes an anti-PD-1 or PD-L1 antibody molecule and an anti-TIM-3 or anti-LAG-3 antibody, or antigen-binding fragment thereof, is administered.
- the combination of antibodies recited herein is used to treat a bacterial infection selected from those described herein. The efficacy of the aforesaid combinations can be tested in animal models known in the art.
- immunomodulators that can be used in the combination therapies include, but are not limited to, e.g., afutuzumab (available from Roche®); pegfilgrastim (Neulasta®); lenalidomide (CC-5013, Revlimid®); thalidomide (Thalomid®), actimid (CC4047); and cytokines, e.g., IL-21 or IRX-2 (mixture of human cytokines including interleukin 1, interleukin 2, and interferon y, CAS 951209-71-5 , available from IRX Therapeutics).
- afutuzumab available from Roche®
- pegfilgrastim Nema®
- lenalidomide CC-5013, Revlimid®
- Thalomid® thalidomide
- actimid CC4047
- cytokines e.g., IL-21 or IRX-2 (mixture of human cytokines including interleukin 1,
- Exemplary doses of such immunomodulators that can be used in combination with the antibacterial compounds of the invention include a dose of anti-PD-1 antibody molecule of about 1 to 10 mg/kg, e.g., 3 mg/kg, and a dose of an anti-CTLA-4 antibody, e.g., ipilimumab, of about 3 mg/kg.
- Compounds of the invention exhibit greater efficacy against important drug-resistant Gram-negative pathogens than hydroxamic acid compounds previously reported or improved off-target effect profiles; thus these compounds are especially useful to treat subjects with drug-resistant infections or avoid adverse side effects.
- Compounds of the invention contain one or more chiral centers. These compounds may be made and used as single isomers or as mixtures of isomers. Methods for separating the isomers, including diastereomers and enantiomers, are known in the art, and examples of suitable methods are described herein.
- the compounds of the invention are used as a single substantially pure isomer, meaning at least 90% of a sample of the compound is the specified isomer and less than 10% of the sample is any other isomer or mixture of isomers. Preferably, at least 95% of the sample is a single isomer.
- a suitable isomer is within the ordinary level of skill, as one isomer will typically be more active in the LpxC in vitro assay described herein and will be the preferred isomer. Where in vitro activity differences between isomers are relatively small, e.g. less than about a factor of 4, a preferred isomer may be selected based on activity level against Gram-negative bacteria such as P. aeruginosa in cell culture, using methods such as those described herein: the isomer having a lower MIC (minimum inhibitory concentration) is preferred.
- the compounds of the invention have the stereochemistry depicted in Formula (IA). These compounds may or may not have a second chiral center at the hydroxyl-substituted carbon, depending on the selection of Y. Where a second chiral center is present, the preferred diastereomer is typically the one having a greater potency as an inhibitor of LpxC by at least a factor of 4; if the two isomers do not differ by a factor of 4 in in vitro activity, each isomer or a mixture of the two may suitably be used for compositions of the invention, or the isomer providing a lower MIC on a bacterial species of interest may be preferred.
- the compounds of the invention may be synthesized by the general synthetic routes below, specific examples of which are described in more detail in the Examples.
- an optical isomer or "a stereoisomer” refers to any of the various stereoisomeric configurations which may exist for a given compound of the present invention and includes geometric isomers. It is understood that a substituent may be attached at a chiral center of a carbon atom.
- the term “chiral” refers to molecules which have the property of non-superimposability on their mirror image partner, while the term “achiral” refers to molecules which are superimposable on their mirror image partner. Therefore, the invention includes enantiomers, diastereomers or racemates of the compound. "Enantiomers” are a pair of stereoisomers that are non- superimposable mirror images of each other.
- a 1:1 mixture of a pair of enantiomers is a "racemic" mixture.
- the term is used to designate a racemic mixture where appropriate.
- "Diastereoisomers” are stereoisomers that have at least two asymmetric atoms, but which are not mirror-images of each other.
- the absolute stereochemistry is specified according to the Cahn- Ingold- Prelog R-S system. When a compound is a pure enantiomer the stereochemistry at each chiral carbon may be specified by either R or S.
- Resolved compounds whose absolute configuration is unknown can be designated (+) or (-) depending on the direction (dextro- or levorotatory) which they rotate plane polarized light at the wavelength of the sodium D line.
- Certain compounds described herein contain one or more asymmetric centers or axes and may thus give rise to enantiomers, diastereomers, and other stereoisomeric forms that may be defined, in terms of absolute stereochemistry, as ( R )- or ( S )-.
- the compounds can be present in the form of one of the possible isomers or as mixtures thereof, for example as pure optical isomers, or as isomer mixtures, such as racemates and diastereoisomer mixtures, depending on the number of asymmetric carbon atoms.
- the present invention is meant to include all such possible stereoisomers, including racemic mixtures, diasteriomeric mixtures and optically pure forms.
- Optically active ( R )- and ( S )- isomers may be prepared using chiral synthons or chiral reagents, or resolved using conventional techniques. If the compound contains a double bond, the substituent may be E or Z configuration. If the compound contains a disubstituted cycloalkyl, the cycloalkyl substituent may have a cis- or trans-configuration. All tautomeric forms are also intended to be included.
- Any resulting mixtures of isomers can be separated on the basis of the physicochemical differences of the constituents, into the pure or substantially pure geometric or optical isomers or diastereomers, for example, by chromatography and/or fractional crystallization.
- any resulting racemates of final products or intermediates can be resolved into the optical antipodes by known methods, e.g., by separation of the diastereomeric salts thereof, obtained with an optically active acid or base, and liberating the optically active acidic or basic compound.
- a basic moiety may thus be employed to resolve the compounds of the present invention into their optical antipodes, e.g., by fractional crystallization of a salt formed with an optically active acid, e.g., tartaric acid, dibenzoyl tartaric acid, diacetyl tartaric acid, di- O,O '- p -toluoyl tartaric acid, mandelic acid, malic acid or camphor-10-sulfonic acid.
- Racemic products can also be resolved by chiral chromatography, e.g., high pressure liquid chromatography (HPLC) using a chiral adsorbent.
- HPLC high pressure liquid chromatography
- the compounds of the present invention can also be obtained in the form of their hydrates, or include other solvents used for their crystallization.
- the compounds of the present invention may inherently or by design form solvates with pharmaceutically acceptable solvents (including water); therefore, it is intended that the invention embrace both solvated and unsolvated forms.
- solvate refers to a molecular complex of a compound of the present invention (including pharmaceutically acceptable salts thereof) with one or more solvent molecules.
- solvent molecules are those commonly used in the pharmaceutical art, which are known to be innocuous to the recipient, e.g., water, ethanol, and the like.
- hydrate refers to the complex where the solvent molecule is water.
- the compounds of the present invention including salts, hydrates and solvates thereof, may inherently or by design form polymorphs.
- salt refers to an acid addition or base addition salt of a compound of the present invention.
- Salts include in particular “pharmaceutically acceptable salts”.
- pharmaceutically acceptable salts refers to salts that retain the biological effectiveness and properties of the compounds of this invention and, which typically are not biologically or otherwise undesirable.
- the compounds of the present invention are capable of forming acid and/or base salts by virtue of the presence of amino and/or carboxyl groups or groups similar thereto.
- Pharmaceutically acceptable acid addition salts can be formed with inorganic acids and organic acids, e.g., acetate, aspartate, benzoate, besylate, bromide/hydrobromide, bicarbonate/carbonate, bisulfate/sulfate, camphorsulfonate, chloride/hydrochloride, chlortheophyllonate, citrate, ethandisulfonate, fumarate, gluceptate, gluconate, glucuronate, hippurate, hydroiodide/iodide, isethionate, lactate, lactobionate, laurylsulfate, malate, maleate, malonate, mandelate, mesylate, methylsulphate, naphthoate, napsylate, nicotinate, nitrate, octadecanoate, oleate, oxalate, palmitate, pamoate, phosphate/hydrogen phosphate/dihydrogen
- Inorganic acids from which salts can be derived include, for example, hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, and the like.
- Organic acids from which salts can be derived include, for example, acetic acid, propionic acid, glycolic acid, oxalic acid, maleic acid, malonic acid, succinic acid, fumaric acid, tartaric acid, citric acid, benzoic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid, toluenesulfonic acid, sulfosalicylic acid, and the like.
- Pharmaceutically acceptable base addition salts can be formed with inorganic and organic bases.
- Inorganic bases from which salts can be derived include, for example, ammonium salts and metals from columns I to XII of the periodic table.
- the salts are derived from sodium, potassium, ammonium, calcium, magnesium, iron, silver, zinc, and copper; particularly suitable salts include ammonium, potassium, sodium, calcium and magnesium salts.
- Organic bases from which salts can be derived include, for example, primary, secondary, and tertiary amines, substituted amines including naturally occurring substituted amines, cyclic amines, basic ion exchange resins, and the like.
- Certain organic amines include isopropylamine, benzathine, cholinate, diethanolamine, diethylamine, lysine, meglumine, piperazine and tromethamine.
- the pharmaceutically acceptable salts of the present invention can be synthesized from a basic or acidic moiety, by conventional chemical methods.
- such salts can be prepared by reacting free acid forms of these compounds with a stoichiometric amount of the appropriate base (such as Na, Ca, Mg, or K hydroxide, carbonate, bicarbonate or the like), or by reacting free base forms of these compounds with a stoichiometric amount of the appropriate acid.
- a stoichiometric amount of the appropriate base such as Na, Ca, Mg, or K hydroxide, carbonate, bicarbonate or the like
- Such reactions are typically carried out in water or in an organic solvent, or in a mixture of the two.
- use of non-aqueous media like ether, ethyl acetate, ethanol, isopropanol, or acetonitrile is desirable, where practicable.
- any formula given herein is intended to represent unlabeled forms as well as isotopically labeled forms of the compounds of the present invention having up to three atoms with non-natural isotope distributions, e.g., sites that are enriched in deuterium or 13 C or 15 N.
- Isotopically labeled compounds have structures depicted by the formulas given herein except that one or more atoms are replaced by an atom having a selected atomic mass or mass number other than the natural-abundance mass distribution.
- isotopes that can be usefully over-incorporated into compounds of the invention include isotopes of hydrogen, carbon, nitrogen, oxygen, phosphorous, fluorine, and chlorine, such as 2 H, 3 H, 11 C, 13 C, 14 C, 15 N, 18 F 31 P, 32 P, 35 S, 36 Cl, 125 l respectively.
- the invention includes various isotopically labeled compounds of the present invention, for example those into which radioactive isotopes, such as 3 H and 14 C, or those in which non-radioactive isotopes, such as 2 H and 13 C are present at levels substantially above normal isotope distribution.
- Such isotopically labelled compounds are useful in metabolic studies (with 14 C, for example), reaction kinetic studies (with, for example 2 H or 3 H), detection or imaging techniques, such as positron emission tomography (PET) or single-photon emission computed tomography (SPECT) including drug or substrate tissue distribution assays, or in radioactive treatment of patients.
- PET positron emission tomography
- SPECT single-photon emission computed tomography
- an 18 F labeled compound of the present invention may be particularly desirable for PET or SPECT studies.
- Isotopically-labeled compounds of the present invention can generally be prepared by conventional techniques known to those skilled in the art or by processes analogous to those described in the accompanying Examples and Preparations using an appropriate isotopically-labeled reagent in place of the non-labeled reagent typically employed. Labeled samples may be useful with quite low isotope incorporation, such as where a radiolabel is used to detect trace amounts of the compound.
- isotopic enrichment factor means the ratio between the isotopic abundance and the natural abundance of a specified isotope.
- a substituent in a compound of this invention is denoted deuterium, such compound has an isotopic enrichment factor for each designated deuterium atom of at least 3500 (52.5% deuterium incorporation at each designated deuterium atom), at least 4000 (60% deuterium incorporation), at least 4500 (67.5% deuterium incorporation), at least 5000 (75% deuterium incorporation), at least 5500 (82.5% deuterium incorporation), at least 6000 (90% deuterium incorporation), at least 6333.3 (95% deuterium incorporation), at least 6466.7 (97% deuterium incorporation), at least 6600 (99% deuterium incorporation), or at least 6633.3 (99.5% deuterium incorporation).
- solvates in accordance with the invention include those wherein the solvent of crystallization may be isotopically substituted, e.g . D 2 O, d 6 -acetone, d 6 -DMSO.
- Compounds of the present invention that contain groups capable of acting as donors and/or acceptors for hydrogen bonds may be capable of forming co-crystals with suitable co-crystal formers.
- These co-crystals may be prepared from compounds of the present invention by known co-crystal forming procedures. Such procedures include grinding, heating, co-subliming, co-melting, or contacting in solution compounds of the present invention with the co-crystal former under crystallization conditions and isolating co-crystals thereby formed.
- Suitable co-crystal formers include those described in WO 2004/078163 . Hence the invention further provides co-crystals comprising a compound of the present invention.
- the present invention provides novel compounds, pharmaceutical formulations including the compounds, methods of inhibiting UDP-3-O-(R-3-hydroxydecanoyl)-N-acetylglucosamine deacetylase (LpxC), and their use in methods of treating Gram-negative bacterial infections.
- the invention provides compounds for use in a method of inhibiting a deacetylase enzyme in a Gram-negative bacterium, the method comprising the step of contacting the Gram-negative bacteria with a compound of the invention, e.g., a compound of Formula I or salt thereof.
- the invention provides a compound of the invention for use in a method for treating a subject with a Gram-negative bacterial infection, the method comprising the step of administering to the subject in need thereof an antibacterially effective amount of a compound of the invention, e.g., a compound of Formula I or salt thereof with a pharmaceutically acceptable carrier.
- a compound of the invention e.g., a compound of Formula I or salt thereof with a pharmaceutically acceptable carrier.
- the compounds of the invention can be administered by known methods, including oral, parenteral, inhalation, and the like.
- the compound of the invention is administered orally, as a pill, lozenge, troche, capsule, solution, or suspension.
- a compound of the invention is administered by injection or infusion. Infusion is typically performed intravenously, often over a period of time between about 15 minutes and 4 hours.
- a compound of the invention is administered intranasally or by inhalation; inhalation methods are particularly useful for treatment of respiratory infections.
- a compound of the invention is administered intravenously, as by IV infusion, wherein the compound may be administered while it is dissolved in any suitable intravenous solution such as Ringer's lactate or an isotonic glucose or saline solution.
- the compounds of the invention can be used for treating conditions caused by the bacterial production of endotoxin and, in particular, by Gram-negative bacteria and bacteria that use LpxC in the biosynthesis of lipopolysaccharide (LPS) or endotoxin.
- LPS lipopolysaccharide
- the compounds of the invention also are useful in the treatment of patients suffering from or susceptible to respiratory tract infections (pneumonia, lung abscesses, bronchiectasis), bacteremia (sepsis), cystic fibrosis, skin and soft tissue infections (wound, surgical infections, complicated diabetic foot, complicated burns) complicated intraabdominal or complicated urinary track infections and sexually transmitted diseases caused by Gram-negative pathogens.
- respiratory tract infections pneumonia, lung abscesses, bronchiectasis
- bacteremia sepsis
- cystic fibrosis skin and soft tissue infections (wound, surgical infections, complicated diabetic foot, complicated burns) complicated intraabdominal or complicated urinary track infections and sexually transmitted diseases caused by Gram-negative pathogens.
- the compounds of the invention also are useful in the conditions that are caused or exacerbated by the bacterial production of lipid A and LPS or endotoxin, such as sepsis, septic shock, systemic inflammation, localized inflammation, chronic obstructive pulmonary disease (COPD) and acute exacerbations of chronic bronchitis (AECB).
- treatment includes the administration of a compound of the invention, or a combination of compounds of the invention, optionally with a second agent wherein the second agent is a second antibacterial agent or a second non-antibacterial agent.
- preferred second non-antibacterial agents include antiendotoxins including endotoxin receptor-binding antibodies, endotoxin-binding antibodies, antiCD14-binding protein antibodies, antilipopolysaccharide-binding protein antibodies and tyrosine kinase inhibitors.
- the compounds of the present invention may also be used with second non-antibacterial agents administered via inhalation.
- Preferred non-antibacterial agents used in this treatment include anti-inflammatory steroids, non-steroidal anti-inflammatory agents, bronchiodilators, mucolytics, anti-asthma therapeutics and lung fluid surfactants.
- the non-antibacterial agent may be selected from a group consisting of albuterol, salbuterol, budesonide, beclomethasone, dexamethasone, nedocromil, beclomethasone, fluticasone, flunisolide, triamcinolone, ibuprofin, rofecoxib, naproxen, celecoxib, nedocromil, ipratropium, metaproterenol, pirbuterol, salneterol, bronchiodilators, mucolytics, calfactant, beractant, poractant alfa, surfaxin and pulmozyme (also called domase alfa).
- the compounds of the invention can be used, alone or in combination with a second antibacterial agent for the treatment of a serious or chronic respiratory tract infection including serious lung and nosocomial infections such as those caused by Enterobacter aerogenes, Enterobacter cloacae, Escherichia coli, Klebsiella pneumoniae, Klebsiella oxytoca, Proteus mirabilis, Serratia marcescens, Stenotrophomonas maltophilia, Pseudomonas aeruginosa, Burkholderia cepacia, Acinetobacter baumanii, Alcaligenes xylosoxidans, Flavobacterium meningosepticum, Providencia stuartii and Citrobacter freundi, community lung infections such as those caused by Haemophilus influenzae, Legionella species, Moraxella catarrhalis, Enterobacter species, Acinetobacter species, Klebsiella species, and Proteus species, and infections caused by other bacterial
- a compound of the present invention may also be used in combination with other agents (combination partners), e.g., an additional antibiotic agent that is or is not of the formula I, for treatment of a bacterial infection in a subject.
- agents e.g., an additional antibiotic agent that is or is not of the formula I
- combination is meant either a fixed combination in one dosage unit form, as separate dosage forms suitable for use together either simultaneously or sequentially, or as a kit of parts for the combined administration where a compound of the present invention and a combination partner may be administered independently at the same time or separately within time intervals that especially allow that the combination partners show a cooperative, e.g., synergistic, effect, or any combination thereof.
- the compounds of the present invention can be used to sensitize Gram-negative bacteria to the effects of a second agent.
- a compound of the present invention is used in combination with a second antibacterial agent;
- second antibacterial agents for such use may be selected from the following groups:
- the second antibacterial agent may be administered in combination with the compounds of the present inventions, wherein the second antibacterial agent is administered prior to, simultaneously with, or after the compound or compounds of the present invention.
- a compound of the invention may be formulated with a second agent into the same dosage form.
- An example of a dosage form containing a compound of the invention and a second agent is a tablet or a capsule.
- a combination of a compound of the invention and a second antibacterial agent may provide synergistic activity.
- use of a compound of the invention with vancomycin or a cephalosporin may be synergistic; thus in some embodiments, the compound of the invention is used in combination with vancomycin or a cephalosporin, typically by infusion.
- the compound of the invention and second antibacterial agent may be administered together, separate but simultaneously, or sequentially.
- the compounds of the invention may be used alone or in combination with a second antibacterial agent; in some embodiments, the second antibacterial agent is administered via inhalation.
- the combination may be administered as a single composition by inhalation.
- a suitable second antibacterial agent is selected from the group consisting of tobramycin, gentamicin, aztreonam, ciprofloxacin, polymyxin, colistin, colymycin, vancomycin, cephalosporins, azithromycin and clarithromycin. Vancomycin is sometimes preferred.
- an "effective amount" of a compound is that amount necessary or sufficient to treat or prevent a bacterial infection and/or a disease or condition described herein.
- an effective amount of a LpxC inhibitor of Formula I is an amount sufficient to treat bacterial infection in a subject.
- an effective amount of the LpxC inhibitor is an amount sufficient to treat a bacterial infection, such as, but not limited to Pseudomonas aeruginosa and the like, in a subject.
- the effective amount can vary depending on such factors as the size and weight of the subject, the type of illness, or the particular compound of the invention. For example, the choice of the compound of the invention can affect what constitutes an "effective amount.”
- One of ordinary skill in the art would be able to study the factors contained herein and make the determination regarding the effective amount of the compounds of the invention without undue experimentation.
- the regimen of administration can affect what constitutes an effective amount.
- the compound of the invention can be administered to the subject either prior to or after the onset of a bacterial infection. Further, several divided dosages, as well as staggered dosages, can be administered daily or sequentially, or the dose can be continuously infused, or can be a bolus injection. Further, the dosages of the compound(s) of the invention can be proportionally increased or decreased as indicated by the exigencies of the therapeutic or prophylactic situation.
- Compounds of the invention may be used in the treatment of states, disorders or diseases as described herein.
- the invention provides use of compounds of the present invention in the treatment of these diseases or for preparation of pharmaceutical compositions having compounds of the present invention for the treatment of these diseases.
- pharmaceutical composition includes preparations suitable for administration to mammals, e.g., humans.
- the compounds of the present invention are administered as pharmaceuticals to mammals, e.g., humans, they can be given per se or as a pharmaceutical composition containing, for example, 0.1 to 99.5% (more preferably, 0.5 to 90%) of a compound of Formula (I) as active ingredient in combination with a pharmaceutically acceptable carrier, or optionally two or more pharmaceutically acceptable carriers.
- phrases "pharmaceutically acceptable carrier” is art recognized and includes a pharmaceutically acceptable material, composition or vehicle, suitable for administering compounds of the present invention to mammals.
- the carriers include liquid or solid filler, diluent, excipient, solvent or encapsulating material, involved in carrying or transporting the subject agent from one organ, or portion of the body, to another organ, or portion of the body.
- Each carrier must be “acceptable” in the sense of being compatible with the other ingredients of the formulation and not injurious to the patient.
- materials which can serve as pharmaceutically acceptable carriers include: sugars, such as lactose, glucose and sucrose; starches, such as corn starch and potato starch; cellulose, and its derivatives, such as sodium carboxymethyl cellulose, ethyl cellulose and cellulose acetate; powdered tragacanth; malt; gelatin; talc; excipients, such as cocoa butter and suppository waxes; oils, such as peanut oil, cottonseed oil, safflower oil, sesame oil, olive oil, corn oil and soybean oil; glycols, such as propylene glycol; polyols, such as glycerin, sorbitol, mannitol and polyethylene glycol; esters, such as ethyl oleate and ethyl laurate; agar; buffering agents, such as magnesium hydroxide and aluminum hydroxide; alginic acid; pyrogen-free water; isotonic saline; Ringer'
- wetting agents such as sodium lauryl sulfate and magnesium stearate, as well as coloring agents, release agents, coating agents, sweetening, flavoring and perfuming agents, preservatives and antioxidants can also be present in the compositions.
- antioxidants examples include: water soluble antioxidants, such as ascorbic acid, cysteine hydrochloride, sodium bisulfate, sodium metabisulfite, sodium sulfite and the like; oil-soluble antioxidants, such as ascorbyl palmitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), lecithin, propyl gallate, ⁇ -tocopherol, and the like; and metal chelating agents, such as citric acid, ethylenediamine tetraacetic acid (EDTA), sorbitol, tartaric acid, phosphoric acid, and the like.
- water soluble antioxidants such as ascorbic acid, cysteine hydrochloride, sodium bisulfate, sodium metabisulfite, sodium sulfite and the like
- oil-soluble antioxidants such as ascorbyl palmitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), lecithin
- Formulations of the present invention include those suitable for oral, nasal, inhalation, topical, transdermal, buccal, sublingual, rectal, vaginal and/or parenteral administration.
- the formulations may conveniently be presented in unit dosage form and may be prepared by any methods well known in the art of pharmacy.
- the amount of active ingredient that can be combined with a carrier material to produce a single dosage form will generally be that amount of the compound that produces a therapeutic effect. Generally, out of one hundred per cent, this amount will range from about 1 per cent to about ninety-nine percent of active ingredient, preferably from about 5 per cent to about 70 per cent, most preferably from about 10 per cent to about 30 per cent.
- Methods of preparing these formulations or compositions include the step of bringing into association a compound of the present invention with the carrier and, optionally, one or more accessory ingredients.
- the formulations are prepared by uniformly and intimately bringing into association a compound of the present invention with liquid carriers, or finely divided solid carriers, or both, and then, if necessary, shaping the product.
- Formulations of the invention suitable for oral administration may be in the form of capsules, cachets, pills, tablets, lozenges (using a flavored base, for example, usually sucrose and acacia or tragacanth), powders, granules, or as a solution or a suspension in an aqueous or non-aqueous liquid, or as an oil-in-water or water-in-oil liquid emulsion, or as an elixir or syrup, or as pastilles (using an inert base, such as gelatin and glycerin, or sucrose and acacia) and/or as mouth washes and the like, each containing a predetermined amount of a compound of the present invention as an active ingredient.
- a compound of the present invention may also be administered as a bolus, electuary or paste.
- the active ingredient is mixed with one or more pharmaceutically acceptable carriers, such as sodium citrate or dicalcium phosphate, and/or any of the following: fillers or extenders, such as starches, lactose, sucrose, glucose, mannitol, and/or silicic acid; binders, such as, for example, carboxymethylcellulose, alginates, gelatin, polyvinyl pyrrolidone, sucrose and/or acacia; humectants, such as glycerol; disintegrating agents, such as agar-agar, calcium carbonate, potato or tapioca starch, alginic acid, certain silicates, and sodium carbonate; solution retarding agents, such as paraffin; absorption accelerators, such as quaternary ammonium compounds; wetting agents, such as, for example, cetyl alcohol and glycerol monostea
- compositions may also comprise buffering agents.
- Solid compositions of a similar type may also be employed as fillers in soft and hard-filled gelatin capsules using such excipients as lactose or milk sugars, as well as high molecular weight polyethylene glycols and the like.
- a tablet may be made by compression or molding, optionally with one or more accessory ingredients.
- Compressed tablets may be prepared using binder (for example, gelatin or hydroxypropylmethyl cellulose), lubricant, inert diluent, preservative, disintegrant (for example, sodium starch glycolate or cross-linked sodium carboxymethyl cellulose), surface-active or dispersing agent.
- Molded tablets may be made by molding in a suitable machine a mixture of the powdered compound moistened with an inert liquid diluent.
- the tablets, and other solid dosage forms of the pharmaceutical compositions of the present invention may optionally be scored or prepared with coatings and shells, such as enteric coatings and other coatings well known in the pharmaceutical-formulating art. They may also be formulated so as to provide slow or controlled release of the active ingredient therein using, for example, hydroxypropylmethyl cellulose in varying proportions to provide the desired release profile, other polymer matrices, liposomes and/or microspheres.
- compositions may be sterilized by, for example, filtration through a bacteria-retaining filter, or by incorporating sterilizing agents in the form of sterile solid compositions that can be dissolved in sterile water, or some other sterile injectable medium immediately before use.
- These compositions may also optionally contain opacifying agents and may be of a composition that they release the active ingredient(s) only, or preferentially, in a certain portion of the gastrointestinal tract, optionally, in a delayed manner.
- embedding compositions that can be used include polymeric substances and waxes.
- the active ingredient can also be in micro-encapsulated form, if appropriate, with one or more of the above-described excipients.
- Liquid dosage forms for oral administration of the compounds of the invention include pharmaceutically acceptable emulsions, microemulsions, solutions, suspensions, syrups and elixirs.
- the liquid dosage forms may contain inert diluent commonly used in the art, such as, for example, water or other solvents, solubilizing agents and emulsifiers, such as ethyl alcohol, isopropyl alcohol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butylene glycol, oils (in particular, cottonseed, groundnut, corn, germ, olive, castor and sesame oils), glycerol, tetrahydrofuryl alcohol, polyethylene glycols and fatty acid esters of sorbitan, and mixtures thereof.
- inert diluent commonly used in the art, such as, for example, water or other solvents, solubilizing agents and e
- the oral compositions can also include adjuvants such as wetting agents, emulsifying and suspending agents, sweetening, flavoring, coloring, perfuming and preservative agents.
- adjuvants such as wetting agents, emulsifying and suspending agents, sweetening, flavoring, coloring, perfuming and preservative agents.
- Suspensions in addition to the active compounds, may contain suspending agents as, for example, ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar-agar and tragacanth, and mixtures thereof.
- suspending agents as, for example, ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar-agar and tragacanth, and mixtures thereof.
- Formulations of the present invention which are suitable for vaginal administration also include pessaries, tampons, creams, gels, pastes, foams or spray formulations containing such carriers as are known in the art to be appropriate.
- Dosage forms for the topical or transdermal administration of a compound of this invention include powders, sprays, ointments, pastes, creams, lotions, gels, solutions, patches and inhalants.
- the active compound may be mixed under sterile conditions with a pharmaceutically acceptable carrier, and with any preservatives, buffers, or propellants that may be required.
- Powders and sprays can contain, in addition to a compound of this invention, excipients such as lactose, talc, silicic acid, aluminum hydroxide, calcium silicates and polyamide powder, or mixtures of these substances.
- Sprays can additionally contain customary propellants, such as chlorofluorohydrocarbons and volatile unsubstituted hydrocarbons, such as butane and propane.
- Ophthalmic formulations are also contemplated as being within the scope of this invention.
- compositions of this invention suitable for parenteral administration comprise one or more compounds of the invention in combination with one or more pharmaceutically acceptable carriers such as sterile isotonic aqueous or nonaqueous solutions, dispersions, suspensions or emulsions, or sterile powders which may be reconstituted into sterile injectable solutions or dispersions just prior to use, which may contain antioxidants, buffers, bacteriostats, solutes which render the formulation isotonic with the blood of the intended recipient or suspending or thickening agents.
- pharmaceutically acceptable carriers such as sterile isotonic aqueous or nonaqueous solutions, dispersions, suspensions or emulsions, or sterile powders which may be reconstituted into sterile injectable solutions or dispersions just prior to use, which may contain antioxidants, buffers, bacteriostats, solutes which render the formulation isotonic with the blood of the intended recipient or suspending or thickening agents.
- aqueous and nonaqueous carriers examples include water, ethanol, glycol ethers, polyols (such as glycerol, propylene glycol, polyethylene glycol, and the like), and suitable mixtures thereof, vegetable oils, such as olive oil, and injectable organic esters, such as ethyl oleate.
- suitable aqueous and nonaqueous carriers include water, ethanol, glycol ethers, polyols (such as glycerol, propylene glycol, polyethylene glycol, and the like), and suitable mixtures thereof, vegetable oils, such as olive oil, and injectable organic esters, such as ethyl oleate.
- Proper fluidity can be maintained, for example, by the use of coating materials, such as lecithin, by the maintenance of the required particle size in the case of dispersions, and by the use of surfactants.
- compositions may also contain adjuvants such as preservatives, wetting agents, emulsifying agents and dispersing agents. Prevention of the action of microorganisms may be ensured by the inclusion of various antibacterial and antifungal agents, for example, paraben, chlorobutanol, phenol sorbic acid, and the like. It may also be desirable to include isotonic agents, such as sugars, sodium chloride, and the like into the compositions. In addition, prolonged absorption of the injectable pharmaceutical form may be brought about by the inclusion of agents that delay absorption such as aluminum monostearate and gelatin.
- the absorption of the drug in order to prolong the effect of a drug, it is desirable to slow the absorption of the drug from subcutaneous or intramuscular injection. This may be accomplished by the use of a liquid suspension of crystalline or amorphous material having poor water solubility. The rate of absorption of the drug then depends upon its rate of dissolution which, in turn, may depend upon crystal size and crystalline form. Alternatively, delayed absorption of a parenterally-administered drug form is accomplished by dissolving or suspending the drug in an oil vehicle.
- the preparations of the present invention may be given orally, parenterally, topically, or rectally. They are of course given by forms suitable for each administration route. For example, they are administered in tablets or capsule form, by injection, inhalation, eye lotion, ointment, suppository, etc., administration by injection, infusion or inhalation; topical by lotion or ointment; and rectal by suppositories.
- parenteral administration and “administered parenterally” as used herein means modes of administration other than enteral and topical administration, usually by injection, and includes, without limitation, intravenous, intramuscular, intraarterial, intrathecal, intracapsular, intraorbital, intracardiac, intradermal, intraperitoneal, transtracheal, subcutaneous, subcuticular, intraarticular, subcapsular, subarachnoid, intraspinal and intrasternal injection and infusion.
- Intravenous infusion is sometimes a preferred method of delivery for compounds of the invention. Infusion may be used to deliver a single daily dose or multiple doses.
- a compound of the invention is administered by infusion over an interval between 15 minutes and 4 hours, typically between 0.5 and 3 hours. Such infusion may be used once per day, twice per day or up to three times per day.
- systemic administration means the administration of a compound, drug or other material other than directly into the central nervous system, such that it enters the patient's system and, thus, is subject to metabolism and other like processes, for example, subcutaneous administration.
- These compounds may be administered to humans and other animals for therapy by any suitable route of administration, including orally, nasally, as by, for example, a spray, rectally, intravaginally, parenterally, intracisternally and topically, as by powders, ointments or drops, including buccally and sublingually.
- the compounds of the present invention which may be used in a suitable hydrated form, and/or the pharmaceutical compositions of the present invention, are formulated into pharmaceutically acceptable dosage forms by conventional methods known to those of skill in the art.
- Actual dosage levels of the active ingredients in the pharmaceutical compositions of this invention may be varied so as to obtain an amount of the active ingredient which is effective to achieve the desired therapeutic response for a particular patient, composition, and mode of administration, without being toxic to the patient.
- the selected dosage level will depend upon a variety of factors including the activity of the particular compound of the present invention employed, or the ester, salt or amide thereof, the route of administration, the time of administration, the rate of excretion of the particular compound being employed, the duration of the treatment, other drugs, compounds and/or materials used in combination with the particular compound employed, the age, sex, weight, condition, general health and prior medical history of the patient being treated, and like factors well known in the medical arts.
- a physician or veterinarian having ordinary skill in the art can readily determine and prescribe the effective amount of the pharmaceutical composition required.
- the physician or veterinarian could start doses of the compounds of the invention employed in the pharmaceutical composition at levels lower than that required in order to achieve the desired therapeutic effect and gradually increase the dosage until the desired effect is achieved.
- a suitable daily dose of a compound of the invention will be that amount of the compound that is the lowest dose effective to produce a therapeutic effect. Such an effective dose will generally depend upon the factors described above.
- intravenous and subcutaneous doses of the compounds of this invention for a patient when used for the indicated effects, will range from about 0.0001 to about 100 mg per kilogram of body weight per day, frequently from about 0.01 to about 50 mg per kg per day, and often from about 1.0 to about 50 mg per kg per day.
- Total daily dosage by intravenous administration is typically 1-4 grams/day for a typical subject (e.g., a 70kg human subject); total daily dosage by inhalation would typically be 50-500 mg per day, or about 100-200 mg.
- An effective amount is that amount treats a bacterial infection.
- the effective daily dose of the active compound may be administered as one, two, three, four, five, six or more sub-doses administered separately at appropriate intervals throughout the day, optionally, in unit dosage forms.
- Compounds delivered orally or by inhalation are commonly administered in one to four doses per day.
- Compounds delivered by injection are typically administered once per day, or once every other day.
- Compounds delivered intravenously are typically administered in one to three doses per day.
- a compound of the present invention While it is possible for a compound of the present invention to be administered alone, it is preferable to administer the compound as a pharmaceutical composition such as those described herein.
- protecting group a readily removable group that is not a constituent of the particular desired end product of the compounds of the present invention.
- the protection of functional groups by such protecting groups, the protecting groups themselves, and their cleavage reactions are described for example in standard reference works, such as e.g., Science of Synthesis: Houben-Weyl Methods of Molecular Transformation. Georg Thieme Verlag, Stuttgart, Germany. 2005. 41627 pp. (URL: http://www.science-of-synthesis.com (Electronic Version, 48 Volumes )); J. F. W. McOmie, "Protective Groups in Organic Chemistry", Plenum Press, London and New York 1973 , in T. W. Greene and P.
- Salts of compounds of the present invention having at least one salt-forming group may be prepared in a manner known per se.
- salts of compounds of the present invention having acid groups may be formed, for example, by treating the compounds with metal compounds, such as alkali metal salts of suitable organic carboxylic acids, e.g., the sodium salt of 2-ethyl hexanoic acid, with organic alkali metal or alkaline earth metal compounds, such as the corresponding hydroxides, carbonates or hydrogen carbonates, such as sodium or potassium hydroxide, carbonate or hydrogen carbonate, with corresponding calcium compounds or with ammonia or a suitable organic amine, stoichiometric amounts or only a small excess of the salt-forming agent preferably being used.
- metal compounds such as alkali metal salts of suitable organic carboxylic acids, e.g., the sodium salt of 2-ethyl hexanoic acid
- organic alkali metal or alkaline earth metal compounds such as the corresponding hydroxides, carbonates or hydrogen carbonates
- Acid addition salts of compounds of the present invention are obtained in customary manner, e.g., by treating the compounds with an acid or a suitable anion exchange reagent.
- Internal salts of compounds of the present invention containing acid and basic salt-forming groups, e.g., a free carboxy group and a free amino group, may be formed, e.g., by the neutralisation of salts, such as acid addition salts, to the isoelectric point, e.g., with weak bases, or by treatment with ion exchangers.
- Salts can be converted in customary manner into the free compounds; metal and ammonium salts can be converted, for example, by treatment with suitable acids, and acid addition salts, for example, by treatment with a suitable basic agent.
- diastereoisomers can be separated in a manner known per se into the individual isomers; diastereoisomers can be separated, for example, by partitioning between polyphasic solvent mixtures, recrystallisation and/or chromatographic separation, for example over silica gel or by, e.g., medium pressure liquid chromatography over a reversed phase column, and racemates can be separated, for example, by the formation of salts with optically pure salt-forming reagents and separation of the mixture of diastereoisomers so obtainable, for example by means of fractional crystallisation, or by chromatography over optically active column materials.
- Intermediates and final products can be worked up and/or purified according to standard methods, e.g., using chromatographic methods, distribution methods, (re-) crystallization, and the like.
- the process steps to synthesize the compounds of the invention can be carried out under reaction conditions that are known per se, including those mentioned specifically, in the absence or, customarily, in the presence of solvents or diluents, including, for example, solvents or diluents that are inert towards the reagents used and dissolve them, in the absence or presence of catalysts, condensation or neutralizing agents, for example ion exchangers, such as cation exchangers, e.g., in the H + form, depending on the nature of the reaction and/or of the reactants at reduced, normal or elevated temperature, for example in a temperature range of from about -100 oC to about 190oC, including, for example, from approximately -80oC to approximately 150oC, for example at from -80 to -60oC, at room temperature, at from -20 to 40oC or at reflux temperature, under atmospheric pressure or in a closed vessel, where appropriate under pressure, and/or in an inert atmosphere, for example under an argon or
- mixtures of isomers that are formed can be separated into the individual isomers, for example diastereoisomers or enantiomers, or into any desired mixtures of isomers, for example racemates or mixtures of diastereoisomers, for example analogously to the methods described in Science of Synthesis: Houben-Weyl Methods of Molecular Transformation. Georg Thieme Verlag, Stuttgart, Germany. 2005 .
- solvents from which those solvents that are suitable for any particular reaction may be selected include those mentioned specifically or, for example, water, esters, such as lower alkyl-lower alkanoates, for example ethyl acetate, ethers, such as aliphatic ethers, for example diethyl ether, or cyclic ethers, for example tetrahydrofurane or dioxane, liquid aromatic hydrocarbons, such as benzene or toluene, alcohols, such as methanol, ethanol or 1- or 2-propanol, nitriles, such as acetonitrile, halogenated hydrocarbons, such as methylene chloride or chloroform, acid amides, such as dimethylformamide or dimethyl acetamide, bases, such as heterocyclic nitrogen bases, for example pyridine or N-methylpyrrolidin-2-one, carboxylic acid anhydrides, such as lower alkanoic acid anhydrides, for example acetic anhydride,
- the compounds, including their salts, may also be obtained in the form of hydrates, or their crystals may, for example, include the solvent used for crystallization. Different crystalline forms may be present.
- the invention relates also to those forms of the process in which a compound obtainable as an intermediate at any stage of the process is used as starting material and the remaining process steps are carried out, or in which a starting material is formed under the reaction conditions or is used in the form of a derivative, for example in a protected form or in the form of a salt, or a compound obtainable by the process according to the invention is produced under the process conditions and processed further in situ.
- co-administration or “combined administration” or the like as utilized herein are meant to encompass administration of the selected therapeutic agents to a single patient, and are intended to include treatment regimens in which the agents are not necessarily administered by the same route of administration or at the same time. Fixed combinations are also within the scope of the present invention.
- the administration of a pharmaceutical combination of the invention results in a beneficial effect, e.g. a synergistic therapeutic effect, compared to a monotherapy applying only one of its pharmaceutically active ingredients.
- Each component of a combination according to this invention may be administered separately, together, or in any combination thereof.
- the compound of the invention and any additional agent may be formulated in separate dosage forms.
- the compound of the invention and any additional agent may be formulated together in any combination.
- the compound of the invention inhibitor may be formulated in one dosage form and the additional agent may be formulated together in another dosage form. Any separate dosage forms may be administered at the same time or different times.
- composition of this invention comprises an additional agent as described herein.
- Each component may be present in individual compositions, combination compositions, or in a single composition.
- the invention is further illustrated by the following examples.
- the assays used throughout the Examples are well established in the art: demonstration of efficacy in these assays is generally regarded as predictive of efficacy in subjects.
- the compounds of the invention can be produced by organic synthesis methods known to one of ordinary skill in the art with reference to the following reaction schemes and examples.
- General methods for synthesis of compounds of Formula (I) are provided in Schemes A-C below.
- a general method to synthesize compounds of Formula (II) is depicted in Scheme A.
- the first step is to generate a nitrile oxide in situ from aldoxime A-2, which then undergoes cycloaddition with an alkyne A-1 to provide isoxazole A-3.
- the ester A-4 can be converted to hydroxamic acid II via direct amide synthesis in the presence of hydroxylamine and a base.
- Alternative hydroxamic acid II can be synthesized via saponification of the ester and amidation of the free acid with O-(tetrahydro-2H-pyran-2-yl)hydroxylamine (THPONH 2 ), followed by de-protection of the THP under acidic conditions (Step 3 and 4).
- Scheme B illustrates an alternative method for the preparation of isoxazole intermediate A3.
- Terminal alkyne B2 can be obtained by using buta-1,3-diyn-1-yltrimethylsilane B1 as the cycloaddition partner.
- Various Z groups can be appended by standard transition metal catalyzed coupling reactions.
- Mass spectra were run on LC-MS systems using electrospray ionization. These were WATERS Acquity Single Quard Detector. [M+H]+ refers to mono-isotopic molecular weights. NMR spectra were run on open access Varian 400 or Varian 500 NMR spectrometers. Spectra were measured at 298K and were referenced using the solvent peak. Chemical shifts for 1H NMR are reported in parts per million (ppm).
- NCS (10.8 g, 81 mmol, 1.2 equiv) was added to a solution of ethyl 5-(hydroxyimino)-2-methyl-2-(methylsulfonyl)pentanoate (17 g, 67.6 mmol) in DMF (34 mL) and the resulting mixture was stirred at rt for 3 hours. The solvent was then removed under vaccum. The residue was dissolved in EtOAc, washed with water, brine, dried over Na 2 SO 4 and concentrated to afford product (19 g, 98% yield). The crude material was continued to the next step with no further purification. LCMS (m/z): 286.2 [M+H] + .
- Step 8 Separation of 1.1f to provide 1.1f-I and 1.1f-II
- the racemic material 1.1f was separated into enantiomer 1.1f-I and 1.1f-II by simulated moving bed chromatography.
- Mobile phase Heptane:EtOH 80:20 Column Chiralpak AD 20uM 8 x (100 x 50 mm) Switch time 71 sec Temperature 25 °C Peak 1 5.5 min Peak 2 8.9 min
- the second peak is the desired isomer ethyl (R)-2-methyl-2-(methylsulfonyl)hex-5-enoate 1.1f-II.
- n-BuLi (53.6 mL, 2.5M in hexane, 86 mmol) was added to a solution of 6-chlorohex-1-yne (5.21 mL, 42.9 mmol) in THF (107 mL) at -78 °C and the resulting solution was stirred at rt for 24 hours.
- Iodine (10.88 g, 42.9 mmol) was then added and the solution was stirred at rt for 3 hours.
- the solvent was removed under reduced pressure and the residue was partitioned between TBME and water. The organic layer was washed with brine, dried over Na 2 SO 4 and concentrated.
- Step 1 Synthesis of Trimethyl((1-methylcyclopropyl)buta-1,3-diyn-1-yl)silane [1.8a]
- Step 2 Synthesis of 1-(buta-1,3-diyn-1-yl)-1-methylcyclopropane [1.8 b]
- Step 3 Synthesis of (R)-N-hydroxy-2-methyl-4-(5-((1-methylcyclopropyl)ethynyl)isoxazol-3-yl)-2-(methylsulfonyl)butanamide [1.8]
- Step 1 Synthesis of (R)-Benzyl 4-(5-(5-hydroxypent-1-yn-1-yl)isoxazol-3-yl)-2-methyl-2-(methylsulfonyl)butanoate [1.11a]
- Step 2 Synthesis of (R)-Benzyl 2-methyl-2-(methylsulfonyl)-4-(5-(5-oxopent-1-yn-1-yl)isoxazol-3-yl)butanoate [1.11b]
- Step 3 Synthesis of (R)-Benzyl 4-(5-(5,5-difluoropent-1-yn-1-yl)isoxazol-3-yl)-2-methyl-2-(methylsulfonyl)butanoate [1.11c]
- Steps 4 Synthesis of (R)-4-(5-(5,5-Difluoropent-1-yn-1-yl)isoxazol-3-yl)-N-hydroxy-2-methyl-2-(methylsulfonyl)butanamide [1.11]
- Step 1 (R)-benzyl 4-(5-((3-fluorocyclobutyl)ethynyl)isoxazol-3-yl)-2-methyl-2-(methylsulfonyl)butanoate [1.13a]
- Steps 5 Synthesis of (R)-N-hydroxy-4-(5-(5-hydroxy-5-methylhex-1-yn-1-yl)isoxazol-3-yl)-2-methyl-2-(methylsulfonyl)butanamide [1.14]
- Step 7 Synthesis of (3-(methoxymethyl)cyclobutyl)buta-1,3-diyn-1-yl)trimethylsilane [1.15g]
- Step 8 Synthesis of 1-(buta-1,3-diyn-1-yl)-3-(methoxymethyl)cyclobutane [1.15h]
- Step 9 Synthesis of (R)-benzyl 4-(5-((3-(methoxymethyl)cyclobutyl)ethynyl)isoxazol-3-yl)-2-methyl-2-(methylsulfonyl)butanoate [1.15i]
- Step 10 Synthesis of (R)-N-hydroxy-4-(5-((3-(methoxymethyl)cyclobutyl)ethynyl)isoxazol-3-yl)-2-methyl-2-(methylsulfonyl)butanamide [1.15-1 and 1.15-2]
- Powdered sodium hydroxide (19.7 mg, 0.493 mmol) was added to a mixture of 2.1d (40 mg, 0.099 mmol) and hydroxylamine (0.151 mL, 2.47 mmol) in 1:1 THF:MeOH (1 mL). The reaction was stirred at ambient temperature for 15 min. Volatiles were removed under reduced pressure. The crude material was purified by reverse-phase HPLC to afford give 2.1 (9 mg, 20 % yield).
- Tributyl(ethynyl)stannane (4 g, 12.7 mmol, 1.0 equiv) and ethyl (E)-2-chloro-2-(hydroxyimino)acetate (1.92 g, 12.7 mmol, 1.0 equiv) were dissolved in diethyl ether (40 mL).
- TEA (6.41 g, 63.5 mmol, 5.0 equiv) was added dropwise and the reaction mixture was stirred at room temperature for 4 hours. The reaction was quenched with water and extracted with EtOAc. The organic layer was washed with brine, dried over sodium sulfate and concentrated.
- the diastereomer ( ⁇ )- 3.1e was separated by chiral SFC to afford two enantiomers: Isomer 1: tR 1.45 min and isomer 2: tR 2.76 min.
- the isomer 2 is the desired enantiomer 3.1e.
- Triethylamine (0.280 ml, 2.007 mmol) was added to a solution of 3.1d (420 mg, 2.007 mmol) and 3.1f (528 mg, 2.107 mmol) in DCE. After 10 mins, AcOH (0.230 ml, 4.01 mmol) was then added and the reaction stirred at rt for 18 hours. Sodium triacetoxyborohydride (1.2 g, 5.66 mmol) was then added and the mixture was stirred for 3 hours. The reaction was quenched by adding water and sat. aq. NaHCO 3 solution. The mixture was extracted with DCM. The organic layer was dried over Na 2 SO 4 and concentrated. The crude material was purified by silica gel column chromatography, EtOAc/heptane, 0 to 100% to afford product 436 mg (yield 60%). LCMS (m/z): 360.4 [M+H] + .
- Step 1 Synthesis of (2R)-benzyl 4-(5-(2-hydroxybutyl)isoxazol-3-yl)-2-methyl-2-(methylsulfonyl)butanoate [4.1a]
- Step 2 Synthesis of benzyl (2R)-2-methyl-2-(methylsulfonyl)-4-(5-(2-((methylsulfonyl)oxy)butyl)isoxazol-3-yl)butanoate [4.1b]
- Step 3 Synthesis of (R,E)-4-(5-(but-1-en-1-yl)isoxazol-3-yl)-N-hydroxy-2-methyl-2-(methylsulfonyl)butanamide [4.1]
- Step 1 Synthesis of (E)-(4-cyclopropylbut-3-en-1-yn-1-yl)trimethylsilane, (Z)-(4-cyclopropylbut-3-en-1-yn-1-yl)trimethylsilane [4.2a]
- Step 2 Synthesis of (R,E)-4-(5-(2-cyclopropylvinyl)isoxazol-3-yl)-N-hydroxy-2-methyl-2-(methylsulfonyl)butanamide [4.2]
- Step 2 synthesis of (4-cyclopropyl-3-fluorobut-3-en-1-yn-1-yl)trimethylsilane [4.5b]
- the P. aeruginosa LpxC protein is produced according to the general method of Hyland et al (Journal of Bacteriology 1997 179, 2029-2037 : Cloning, expression and purification of UDP-3-O-acyl-GlcNAc deacetylase from Pseudomonas aeruginosa: a metalloamidase of the lipid A biosynthesis pathway).
- the LC-MS/MS method for quantitation of LpxC product was developed using an Agilent 1200 Capillary HPLC system coupled to an Applied Biosystems MDS Sciex 4000QTRAP mass spectrometer. Both instruments are controlled using the Applied Biosystems MDS Sciex Analyst software.
- LpxC reaction product (UDP-3-O-(R-3-hydroxyacyl)-glucosamine) was produced by hydrolysis of LpxC substrate catalyzed by P.a. LpxC and purified using reversed phase chromatography on a Phenomenex Luna C18(2) 4.6 x 50 mm column. An LpxC product calibration curve was generated to evaluate the sensitivity and dynamic range of the LC-MS/MS method. Briefly, compounds are pre-incubated with 1 nM P. aeruginosa LpxC for 30 min. at room temperature. Reactions are initiated by the addition of 2 ⁇ M UDP-3-O-(R-3-hydroxydecanoyl)-GlcNAc.
- Reactions are conducted in a 384-well plate with a total volume of 50 ⁇ L in each well containing 50 mM Sodium phosphate pH 7.5, 0.005% Trition X-100 for 20 min at room temperature. After quenching with 1.8% HOAc (5 ⁇ L of a 20% HOAc added to each well), reaction mixtures are analyzed using the LC-MS/MS method and peak areas are transformed into product concentration using a LpxC product calibration curve. Total activity (0% inhibition control) is obtained from reactions with no inhibitors and 100% inhibition control is the background using quenched samples before reaction starts. For IC 50 determinations, peak areas are converted to percent inhibition in Microsoft Excel. Percent inhibition values are plotted vs. log compound concentration using XLfit. Data is fit to the four-parameter logistic equation using the non-linear regression algorithm in XLfit to return the IC 50 and hill slope values.
- Bacterial isolates were cultivated from -70°C frozen stocks by two consecutive overnight passages at 35°C in ambient air on 5% blood agar (Remel, Lenexa, Kans.). Quality control strain, P. aeruginosa ATCC 27853, A. baumannii ATCC19606 and E. coli ATCC 25922 are from the American Type Culture Collection (ATCC; Rockville, Md.) and PAO1 was received from Dr. K. Poole.
- MICs Minimal Inhibitory Concentrations were determined by the broth microdilution method in accordance with Clinical and Laboratories Institute (CLSI) guidelines (CLSI M100-S25, Performance Standards for Antimicrobial Susceptibility Testing; Twenty-fifth Informational Supplement).
- CFSI Clinical and Laboratories Institute
- MIC M100-S25 Performance Standards for Antimicrobial Susceptibility Testing; Twenty-fifth Informational Supplement.
- fresh bacterial overnight cultures were resuspended in sterile saline, adjusted to a 0.5 McFarland turbidity standard and then diluted 2000-fold in cation adjusted Mueller-Hinton Broth II (MHB; Remel BBL) to yield a final inoculum of approximately 5x10 5 colony-forming units (CFU)/mL.
- MHB Mueller-Hinton Broth II
- LpxC inhibitory activity for selected compounds of the invention on LpxC from P . aeruginosa are reported in Table A.
- the MIC assays for P. aeruginosa, E. coli and A. baumannii were also performed in the presence of sub-inhibotory concentrations of rifampicin to demonstrate the potential for synergy with other antimicrobial agents-see Table B.
- Table A Biological data for selected compounds of the invention. Compound number P.A.
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RS20191403A RS59507B1 (sr) | 2014-12-16 | 2015-12-15 | Jedinjenja izoksazol hidroksamske kiseline kao inhibitori lpxc |
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SI201530987T SI3233843T1 (sl) | 2014-12-16 | 2015-12-15 | Spojine izoksazol hidroksamične kisline kot LPXC inhibitorji |
MA41185A MA41185B1 (fr) | 2014-12-16 | 2015-12-15 | Composés d'acide isoxazole hydroxamique comme inhibiteurs de lpxc |
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